If at all possible, steer clear of the J-1 option. Hunt for a job that allows you to maintain your H-1B status and provides for future sponsorship as an Immigrant. The J-1 Visa option, in all likelihood, would result in your being subject to §212(e) - two year home country residence requirement. Seeking a waiver is oftentimes cumbersome and time consuming. More importantly, since the J has a dual intent limitation (cannot intend to be an immigrant while in this status), you would not be eligible for an immigrant petition. Finally, you will be unable to adjust status until you fulfill the two year home country residence requirement.